To cite package ‘ppgm’ in publications use:

Lawing A, Howard A, Hurtado-Materon M (2025). ppgm: PaleoPhyloGeographic Modeling of Climate Niches and Species Distributions. R package version 1.1, https://CRAN.R-project.org/package=ppgm.

Corresponding BibTeX entry:

  @Manual{,
    title = {ppgm: PaleoPhyloGeographic Modeling of Climate Niches and
      Species Distributions},
    author = {A. Michelle Lawing and Alexandra Howard and Maria-Aleja
      Hurtado-Materon},
    year = {2025},
    note = {R package version 1.1},
    url = {https://CRAN.R-project.org/package=ppgm},
  }